If You Can Do This Many Jumping Jacks at 55, Your Cardio Is Better Than Most

At 55, 30–40 smooth jumping jacks without stopping—and passing the talk test—signals above-average cardiovascular fitness.
Mediafeed on MSN

Everything about testosterone you didn’t know (but probably should)

This article was reviewed by Felix Gussone, MD. What Is Testosterone? The Science Behind Its Impact on Your Body As the ...